B. Riley previously signed a similar deal with Core Scientific in July. : Bitcoin miner Iris Energy (IREN) signed a deal to sell up to $100 million in equity to investment bank B. Riley over the next two years, marking the bank's second big investment in the industry that is facing serious market headwinds. In July, B. Riley signed a similar deal in nature and size with Core Scientific (CORZ), the largest bitcoin miner in the world by actual hashrate.